There is no one mattress that is right for everyone. Mattress Manufacturers all claim to be the best and have the best products. In reality the quality levels change even during a given year. The larger manufacturers off many levels of bedding to try and compete in most segments of the industry. This is a general description of their offerings. It is important to know at least the brand you are interested in so the retailer can't discribe one bed while showing another.
You will find terms and conditions on Mattress Information home page